As of my last knowledge update in September 2021, the term "transformer zero-sequence voltage grounding reactor" does not correspond to a well-known or widely recognized concept in the field of electrical engineering or transformers. It's possible that this term might refer to a specific type of grounding reactor or device developed or discussed after my last update.
However, I can provide you with some general information about grounding reactors and zero-sequence voltage:
Grounding Reactor: A grounding reactor is a type of reactor used in electrical power systems to limit and control the flow of fault currents during ground faults. Grounding reactors are often connected in series with the neutral of transformers or generators to provide impedance to ground fault currents. This helps to limit the fault current magnitude, which can protect equipment and reduce the risk of damage.
Zero-Sequence Voltage: In a three-phase electrical system, zero-sequence voltage refers to the voltage that is present in all three phases with the same magnitude and phase angle. It usually arises due to imbalances in the system, such as ground faults or asymmetrical loads. Zero-sequence voltage can cause undesirable effects, including unbalanced currents and increased stress on equipment.
If the concept of "transformer zero-sequence voltage grounding reactor" has emerged or evolved after September 2021, I recommend consulting more recent and specific sources in the field of electrical engineering or power systems for detailed information on this concept. It's also possible that the term might be specific to a certain region or industry niche that I'm not aware of.